Office (OLE) malware analysis — malicious · eb251875879f94b9

MALICIOUS

Office (OLE)

637.5 KB Created: 2003-03-17 12:47:27 Authoring application: Microsoft Excel

MD5: c5ed78ba9f2d0287b90addd205d182b3 SHA-1: e72db4fd7f05d80df2039b34fdc9fb3a8b53b198 SHA-256: eb251875879f94b995e47213d8ff6241c2ac58f8fb29bf0a1601d40160ecaacb

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The sample is an Excel document containing VBA macros, specifically a Workbook_Open macro that executes code using CreateObject. The document body discusses audit findings and potential issues at various business locations, which appears to be a lure. The presence of a Workbook_Open macro and a CreateProcess API reference suggests the macro is designed to execute a payload. No specific URLs or network indicators were extracted, but the presence of the 'macros.bas' artifact indicates a macro-based execution.

Heuristics 7

Reference to CreateProcess API high SC_STR_CREATEPROCESS

Reference to CreateProcess API
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `1b0fc9876286b9576a1873693d9c2522e253864cc2897d9e0428fc41ab047d3a`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	98808 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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